Wheel brake for motor vehicles



`Dec. 12, 1933.

K. HARDT 1,939,299

WHEEL BRAKE FOR MOTOR VEHICLES Filed May l5, 1950 Patented Dec. 12, 1933 i Y Y 1 :UNITED STATES PATENT OFFICE y. 1,939,293.12 L V u n u Y WHEEL BRAKE MOTOR VEHICLES? f ff l Karl Hardt, Malkendorf, Germany i Application May 15, 1930, Serial No. 452,752, and

in Germany May 16, 1929 4 anims. (c1. 18s-'16) This invention relates to a wheel brake for against the inner face of the flange of the brake motor vehicles. It differs from the known wheel drum 15. As soon as the brake lever is released, brakes in that the casing enclosing same is shut the springs effect an immediate releasing of the off by novel-dustand damp-proof means from brake band 16 or 17 from the brake drum 15, so

5 the connecting parts, gear case and wheel hub. that detrimental friction between the brake ele- 60 The brake may be used both for wheels mountedl ments is prevented when the brake is not in use.4 rigidly on the axle and also for steering wheels. The disk l is preferably screwed rigidly onto the An embodiment ofthe invention is illustrated gear case 8, a packing 34 being interposed. The by Way of example in the accompanying drawing disk 2 is mounted tightly packed by means of in which: packings 9 and 13 on the wheel hub, andthe disks 65 Fig. 1 is a transverse section through a wheel l and V2 are tightly connected by screws 5 so that brake and an absolutely dustand moisture-proof packing Fig. 2 is a section on the horizontal diametrical of the brake casing against the connecting parts line of Fig. 1, the view being partly in elevation. is obtained.

,15` The brake casingconsists of two disks 1 and 2, The shafts 22 and 23 and 32 and 33 are jour- 70- having the respective coacting flanges 3 and 4 naled on one side in a bearing arranged in the which engage one over the other and are concasing disk 1 and on the other side in a bracket 35 nected by means of screws 5. vThe disk 1 is rigidly 0r 36 fastened on the disk 1. All the remaining connected with a suitable xed support such as a parts, such assprings 25, 26, 28, 29 and the counter flange 7 of the gear case 8 by means of screws 6,'- bearing 39 for the brake band 17, are arranged 75 Whereas the disk 4 is rigidly held by means of a on the casing disk 1. two part annularvdisk or collar 12, packedragainst Y The annular disk 12 is formed in two parts. the wheel hub 11, which is provided with a flange 'After loosening the screws' 14, the annular Vdisk 10, by means of a packing 9. The disk 2 is packed can be removedand the wheel 37 pulled off the A against the hub flange 10 by means of a further axle 38 with the -hub 11. After loosening the 80 packing 13, and the ring disk 12 is removably conscrews 5, the disk 2 is removed, when the brake nected to the disk 2 by means of screws 14. The elements are accessible for renewing or repairing. brake drum has the usual disk l5 which is secured I Claimtto flange 10 and which is provided with the usual 1. The combination with a fixed part of a veperipheral flange. Brakebands 16 and 17 vare hicle and the hub of a vehicle wheel, of a brake S5 arranged to engage respectively against the outer casing consisting of a pair of disks, each provided and inner faces of the brake drum flange and are with a peripheral flange, Sad flanges fitting each normally spaced slightly therefrom. The two other telescopically, one ofsaid disks being fixed ends of the brake band 16 are respectively to said fixed part and the other of said disks havfastened to the toothed meshing segments 18 ing an opening therein and surrounding said 90 and 19, and the two ends of the brake band 17 wheel hub, and screws passing radially through are fastened respectively to the toothed meshing the outer of said flanges and engaging in the insegments 20 and 21. The two segments 18 and ner ange 00 hold the Casing parts together- 19 meshing, the one with the other, are rotat- 2. The combination with a fixed part of a ve- V4,0 ably mounted on the shafts 22 and 23 and are hicle and the hub of a vehicle wheel, of a brake 95 urged by the spiral springs 24, 25 and 26 to effect casing consisting of a pair of disks, each proinoperative positioning of the brake band 16. vided with a peripheral flange, Vsaid flanges fit- In asimilar manner the two toothed segments 20 ting each other telescopically, oneof said disks and 21 mounted on the shafts 32 ,and 33 are inbeing xed to said fixed part and the other of said fluenced by the helical springs 27, 28, 29, 30 disks having an opening therein and surrounding 10e and"31. said wheel hub, screws passing through the outer The brake lever '23a adapted to be operated by of said flanges and engaging in the inner fiange foot is keyed on the shaft 23, and the brake lever to hold the casing parts together, said hub having 33a adapted to be operated by hand on the a flange thereon in the plane of the second disk oshaft 33. and substantially closing said opening, and a 30:5

VVIf a brake lever is pulled, the toothed segpacking in the space between the periphery of ments 18 and 19 or 20 and 21 roll one on the said hub flange and the wall of said opening.

other, tensioning the respective helical springs, 3. The combination with a fixed part of a veand the brake band 16 is pressed tightly against hicle and the hub of a vehicle wheel, of a brake Y b5 the outer face, or the brake band 17 is pressed casing consisting of a pair of disks, each provided 11.9

` with a. peripheral flange, said flanges fitting each` other telescopically, one of said disks being fixed to said xed part and the other of said disks having an opening therein and surrounding Vsaid wheel hub, screws passing through the outer of said iianges and engaging in the inner flange to hold the casing parts together, said hub having a flange thereon in the vplane of the second disk and substantiallyclosing said opening, a packing in the space between the periphery `of saidhub 'flange and the wall of said opening, a split collar surrounding said hub and having its parts screw attached to the second disk, and a second packg,

between the hub and the split collar.

' passing radiallythrough theouter flange and into the inner flange and said means.

KARL HARDT.

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